CN214626475U - Self-generating switch - Google Patents
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- CN214626475U CN214626475U CN202120123712.8U CN202120123712U CN214626475U CN 214626475 U CN214626475 U CN 214626475U CN 202120123712 U CN202120123712 U CN 202120123712U CN 214626475 U CN214626475 U CN 214626475U
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Abstract
The utility model provides a self-generating switch, which comprises a key, a driving structure, a generator, a first diode and a first capacitor; the driving structure is respectively connected with the triggering end of the key and the generator; the first output end of the generator is connected with the positive end of the first diode; one end of the first capacitor is connected with the negative end of the first diode; the other end of the first capacitor is grounded; the utility model discloses only adopt a diode to charge for electric capacity in rectifier circuit, replace the full-bridge rectifier circuit that 4 diodes that adopt constitute among the prior art, the pressure drop is littleer, and electric energy loss is littleer.
Description
Technical Field
The utility model relates to the technical field of switches, especially, relate to a from electricity generation switch.
Background
With the popularization of the green environmental protection concept, the technical solutions of using less batteries and adopting no batteries are more and more concerned, so that control components such as switches, doorbells and the like become a complete system by adopting a self-generating micro-energy management technology; taking an indoor switch as an example, an original double-control switch controls a lamp, as shown in fig. 5, a switch (K1) and a switch (K2) need to be connected through an electric wire; and as shown in fig. 4, the self-generating switch is adopted, so that wires and wire grooves between the switches can be saved, the process of slotting on the wall in the installation process is omitted, the labor for installing and wiring is omitted, a battery is not needed, and the self-generating switch has the advantages of environmental friendliness, high efficiency and money saving.
However, the electric energy generated in the self-generating switch circuit is very weak, so that slight electric energy loss in circuit control can bring great influence to the self-generating switch.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the self-generating switch is provided, electric energy consumed in the circuit control process is reduced, and efficient storage and efficient conversion of the electric energy are achieved.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a self-generating switch comprises a key, a driving structure, a generator, a first diode, a first capacitor, an energy density detection circuit, a power management chip, a digital radio frequency chip and an antenna;
the driving structure is respectively connected with the triggering end of the key and the generator;
the first output end of the generator is connected with the positive end of the first diode;
one end of the first capacitor is connected with the negative end of the first diode and the first input end of the power management chip respectively;
the other end of the first capacitor is grounded;
the second output end of the generator is connected with the input end of the energy density detection circuit;
the output end of the energy density detection circuit is connected with the second input end of the power management chip;
the output end of the power management chip is connected with the power supply end of the digital radio frequency chip;
the first end of the key is connected with the signal input end of the digital radio frequency chip;
and the output end of the digital radio frequency chip is connected with the antenna.
Further, the device also comprises a first resistor;
the second end of the key is connected with one end of the first resistor;
the other end of the first resistor is grounded.
Furthermore, the first ends of the plurality of keys are respectively connected with the plurality of signal input ends of the digital radio frequency chip in a one-to-one correspondence manner;
the second ends of the plurality of keys are respectively connected with the one end of the first resistor.
Further, the first output end of the generator is a positive end;
and the negative end of the generator is grounded.
Further, the first capacitor is a tantalum capacitor.
Further, the LED also comprises a second diode;
the second diode and the first capacitor are connected in parallel.
Further, the second diode is a zener diode.
Further, the energy density detection circuit comprises a third diode, a second capacitor, a second resistor and a third resistor;
the positive end of the third diode is connected with the second output end of the generator;
the negative electrode end of the third diode is connected with one end of the second capacitor;
the other end of the second capacitor is grounded;
one end of the second resistor is connected with the negative electrode end of the third diode;
the other end of the second resistor is respectively connected with one end of the third resistor and the second input end of the power management chip;
the other end of the third resistor is grounded.
Further, the resistance value of the second resistor is 510K ohms;
the resistance value of the third resistor is 1000K ohms.
Further, the antenna is an on-board antenna.
The beneficial effects of the utility model reside in that: the utility model provides a pair of from power generation switch, in rectifier circuit, the positive terminal of the output connection diode of generator charges for electric capacity, only collects the forward current that the forward was pressed, and only passed through 1 diode when electric capacity charges for electric current, produce a pressure drop, replace the full-bridge rectifier circuit that 4 diodes that adopt formed among the prior art, the pressure drop is littleer, the electric energy loss is littleer, be fit for the push type more and from the charging circuit of electricity generation, can realize the high-efficient storage and the conversion of electric energy.
Drawings
Fig. 1 is a schematic frame diagram of a self-generating switch according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a self-generating switch according to an embodiment of the present invention;
fig. 3-1 is a schematic structural diagram of a left-side communication component according to an embodiment of the present invention;
fig. 3-2 is a schematic structural diagram of an intermediate communication component according to an embodiment of the present invention;
fig. 3-3 are schematic structural diagrams of right-side communication components according to embodiments of the present invention;
fig. 4 is an analysis diagram of the energy transfer and signal transfer process in the energy transfer and signal transfer components according to an embodiment of the present invention;
fig. 5 is a schematic view of a self-generating switch controlled lamp according to an embodiment of the present invention;
FIG. 6 is a diagram of a prior art dual-control switch controlled lamp;
fig. 7 is a schematic diagram of a half-bridge rectification energy storage according to an embodiment of the present invention;
FIG. 8 is a prior art full bridge rectified energy storage schematic;
fig. 9 is an energy density detection circuit according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a button according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a prior art key press;
fig. 12 is a schematic diagram of an onboard antenna structure according to an embodiment of the present invention.
Description of reference numerals:
r3, a first resistor; c1, a first capacitance; d1, a first diode; DZ1, a second diode; c2, a second capacitor; r1, a second resistor; r2, third resistor; d2, a third diode; u1, power management chip; u2, digital radio frequency chip; A. a hinge of the communication part; B. an energy component signal transfer point; C. an energy transfer point for the energy transfer component; D. an audible component pressing area; E. a bottom case of the switch; F. a stressed area of the connecting rod; H. a signal collection component on the circuit board; I. the installation area of the generator on the bottom shell.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 and 2, a self-generating switch includes a key, a driving structure, a generator, a first diode, a first capacitor, an energy density detection circuit, a power management chip, a digital radio frequency chip, and an antenna;
the driving structure is respectively connected with the triggering end of the key and the generator;
the first output end of the generator is connected with the positive end of the first diode;
one end of the first capacitor is connected with the negative end of the first diode and the first input end of the power management chip respectively;
the other end of the first capacitor is grounded;
the second output end of the generator is connected with the input end of the energy density detection circuit;
the output end of the energy density detection circuit is connected with the second input end of the power management chip;
the output end of the power management chip is connected with the power supply end of the digital radio frequency chip;
the first end of the key is connected with the signal input end of the digital radio frequency chip;
and the output end of the digital radio frequency chip is connected with the antenna.
From the above description, the beneficial effects of the present invention are: the utility model provides a pair of from power generation switch, in rectifier circuit, the positive terminal of the output connection diode of generator charges for electric capacity, only collect the forward current that the forward was pressed, and only passed through 1 diode when electric capacity charges for electric current, produce a pressure drop, replace the full-bridge rectifier circuit that adopts same model rectifier device to constitute among the prior art, the pressure drop is littleer, the electric energy loss is littleer, be fit for the push type more and from the charging circuit of electricity generation, can realize the high-efficient storage and the conversion of electric energy.
Further, the device also comprises a first resistor;
the second end of the key is connected with one end of the first resistor;
the other end of the first resistor is grounded.
According to the description, the ground resistor is connected in series at the key, the key is different from the key directly connected with the ground wire in the prior art, the release current of the IO port to the ground after the key is closed can be reduced, the electric energy loss is smaller, and the self-generating micro-energy management is facilitated.
Furthermore, the first ends of the plurality of keys are respectively connected with the plurality of signal input ends of the digital radio frequency chip in a one-to-one correspondence manner;
the second ends of the plurality of keys are respectively connected with the one end of the first resistor.
Through setting up a plurality of buttons, press different buttons and can trigger different signals, different signals can control a plurality of objects, compare single button, and control function is stronger.
Further, the first output end of the generator is a positive end;
and the negative end of the generator is grounded.
Therefore, the positive end of the generator is connected with the positive end of the diode to charge the capacitor, namely, only the forward current pressed in the forward direction is selected, the electric energy generated when the button is reset is abandoned, the influence of human factors is avoided, and the capacitor is more stable compared with the prior art.
Further, the first capacitor is a tantalum capacitor.
From the above description, it can be seen that, by using the tantalum capacitor for energy storage, the tantalum capacitor has excellent properties of strong stability, high precision and small volume, and the capacitor is reinforced and restored with its insulating capability through the oxide film medium, and has a unique self-healing function, so that it will not be damaged cumulatively by the connection, thereby improving the stability of the energy storage circuit.
Further, the LED also comprises a second diode;
the second diode and the first capacitor are connected in parallel.
As can be seen from the above description, the diode is connected in parallel to the energy storage capacitor, so that the peak voltage output by the generator can be absorbed, and the function of protecting the circuit is achieved.
Further, the second diode is a zener diode.
As can be seen from the above description, by using the zener diode, the zener diode having the breakdown characteristic at an accurate voltage can be used as a limiting or protecting element, since zener diodes with various breakdown voltages are available, and are very suitable for the application in the overvoltage protection circuit.
Further, the energy density detection circuit comprises a third diode, a second capacitor, a second resistor and a third resistor;
the positive end of the third diode is connected with the second output end of the generator;
the negative electrode end of the third diode is connected with one end of the second capacitor;
the other end of the second capacitor is grounded;
one end of the second resistor is connected with the negative electrode end of the third diode;
the other end of the second resistor is respectively connected with one end of the third resistor and the second input end of the power management chip;
the other end of the third resistor is grounded.
As can be seen from the above description, by using the output terminal of the generator to charge the second capacitor through the positive terminal of the third diode, the current directions of the first diode and the third diode are the same, and the current directions of the first capacitor and the second capacitor are also ensured to be the same, so that the full-charge voltages of the first capacitor and the second capacitor are the same; the second resistor and the third resistor are connected in series to form a pull-down resistor, and the pull-down resistor is connected with the second capacitor in parallel, so that the voltage value of the second capacitor can be judged through the proportional relation between the second resistor and the third resistor only by identifying the ground resistance value of the third resistor; in conclusion, the energy density detection circuit can identify the electromotive force direction of the generator and collect the electric energy density.
Further, the resistance value of the second resistor is 510K ohms;
the resistance value of the third resistor is 1000K ohms.
According to the above description, through setting the second resistor to 510K ohms and the third resistor to 1000K ohms, through experimental tests, the self-consumption of the second resistor and the third resistor is very low, and the strength of signal detection can be ensured to meet the identification use of the circuit.
Further, the antenna is an on-board antenna.
According to the description, the onboard antenna is adopted to replace an external spiral antenna or a ceramic antenna in the prior art, so that the electric energy loss can be reduced, the performance requirement of the self-generating switch system is met, and the onboard antenna has the characteristics of low cost, small thickness, easiness in production and attractiveness.
The utility model discloses above-mentioned from power generation switch is applicable to various equipment that need wireless on-off control, electronic product such as single track wireless switch, multichannel wireless switch, remote controller explains through embodiment mode below:
the embodiment of the utility model discloses a do:
a self-generating switch comprises a key, a driving structure, a generator, a first capacitor, a first diode, an energy density detection circuit, a power management chip, a digital radio frequency chip and an antenna;
the driving structure is respectively connected with the triggering end of the key and the generator;
the first end of the key is connected with the signal input end of the digital radio frequency chip;
the embodiment comprises a plurality of keys, wherein the keys respectively adopt an energy communication component to transmit kinetic energy of key pressing to a generator through a driving structure contained in the keys and transmit pressing signals to a digital radio frequency chip; the communication component is a community component capable of carrying out energy transfer and signal transfer;
specifically, as shown in fig. 3-1, 3-2, and 3-3, the present embodiment includes 3 buttons, and corresponding 3 signaling components are arranged in parallel on the top of the switch, which is equivalent to a panel of the switch and made of plastic or metal material, and the signaling components mainly include a rotating shaft a, a button trigger point B close to the rotating shaft a, and a power transmission point C far from the rotating shaft a;
as shown in fig. 4, the key pressing process includes: when a user presses the D area of any one of the information components downwards with force, the D surface of the information component moves towards the bottom shell E around the rotating shaft A, when the C point contacts any input point G in the F area of the connecting rod, the kinetic energy of any component of the 3 paths of information components is transmitted to the generator, the generator is arranged at the I position of the bottom shell, the generator rotates to the generator to generate positive electromotive force, when the C point contacts the G point at the same moment, the signal transmission point B just contacts the H point of the key, and the signal of the key action is transmitted to the digital radio frequency chip at the same moment;
the rotating shaft and the connecting rod form the driving structure;
as shown in fig. 7, the first output terminal of the generator is connected to the positive terminal of the first diode D1;
one end of the first capacitor C1 is respectively connected with the negative electrode end of the first diode D1 and the first input end of the power management chip U1;
the other end of the first capacitor C1 is grounded;
the second output end of the generator is connected with the input end of the energy density detection circuit;
the output end of the energy density detection circuit is connected with the second input end of the power management chip U1;
the output end of the power management chip U1 is connected with the power supply end of the digital radio frequency chip U2;
the output end of the digital radio frequency chip U2 is connected with an antenna;
as shown in fig. 1 and 2, the operation process of the self-generating switch is as follows: rectifying the positive end of the generator through a diode, and then charging the capacitor for storing energy; the positive end of the generator is also connected with the energy density detection circuit and is used for identifying the electromotive force direction of the generator and collecting the electric energy density; the energy density detection circuit transmits the acquired data to the power management chip, when the power management chip judges that the self-generating system is in the optimal energy density, the power management chip converts the electric energy stored by the capacitor into proper voltage to supply power to the digital radio frequency chip, and the digital radio frequency chip calls preset encoding data according to a received key action signal on the premise of supplying power, generates a high-frequency signal through the oscillating circuit and transmits the high-frequency signal through the antenna;
as shown in fig. 5, the self-generating switch described in this embodiment can be used as a secondary switch in a lamp control circuit, wherein the kinetic energy generated by pressing the switch with a hand is converted into electric energy by the self-generating switch, then the electric energy is collected and managed, the switch data is sent by a wireless radio frequency technology, the received data is decoded by the main switch, and then the lamp is driven, so that the function of wireless switch control is achieved, and compared with the traditional double-control switch control lamp, the lamp is more efficient, convenient, environment-friendly and economical as shown in fig. 6.
The embodiment of the utility model discloses an embodiment two is:
as shown in fig. 7, on the basis of the first embodiment, the rectifying tank circuit is further defined:
as shown in fig. 8, a full-bridge rectification energy storage circuit composed of 4 diodes is adopted in the prior art, the generator can collect the energy generated by pressing and resetting the key, wherein the time used for pressing is represented by T1, the time for holding the hand on the key panel after pressing the key is represented by T2, when the generator has the acting force of self-resetting after the hand is released, and the time for resetting is represented by T3, then the time difference Δ T between the generation of one time and the generation of the reset is T1+ T2+ T3, wherein the rectification energy storage circuit in the prior art is greatly influenced by Δ T because T1 and T3 can be controlled by a mechanical structure and is almost fixed, but T2 is an artificial factor and can be long or short, which results in that the variation of Δ T is large, the time difference between the generation of two times is not fixed and is possibly large, and the rectification energy storage circuit in the prior art is greatly influenced by Δ T, and all electronic components have the characteristic of self-consumption, the electric energy generated by pressing the generator is weak, and when the time delta T is longer, the electric energy generated for the first time may start to be consumed before the electricity generated for the second time is not generated, even the electric energy generated for the first time cannot be utilized, so that an unstable factor exists;
in the embodiment, a half-bridge rectification energy storage circuit is adopted, and only forward current pressed forward is selected, so that power generation is fastest when the power generation is pressed for the first time, the power generation is not influenced by human, and the power generation is more stable compared with the prior art;
specifically, in the half-bridge rectification energy storage circuit of the present embodiment, the positive terminal of the generator is connected to the positive terminal of the first diode D1;
the negative end of the generator is grounded;
a second diode DZ 1;
the second diode DZ1 is a zener diode;
the second diode DZ1 and the first capacitor C1 are connected in parallel;
the first capacitor C1 is a tantalum capacitor;
specifically, the packaging specification of the tantalum capacitor is 3225, the withstand voltage value is 6.3V, and the capacity is 22 UF;
the model of the first diode D1 is Schottky S4, the packaging specification is SOD323, the withstand voltage value is 40V, and the maximum current bearing value is 200 MA;
the working principle of the half-bridge rectification energy storage circuit in the embodiment is that the positive end of the generator is connected with the diode D1 to directly charge the capacitor C1, the capacitor C1 is connected with the Zener diode DZ1 in parallel to absorb the peak voltage on the generator to play a role of a protection circuit, and in this way, the capacitor is charged by current only through 1 diode, the voltage drop is that the VF value of the diode is 0.4-0.6V, and the capacitor is charged by current in the full-bridge rectification circuit through 2 diodes, the voltage drop is twice, if the full-bridge rectification circuit adopts the same rectification device, the voltage drop in the charging process is 0.8V, and from this point, the half-bridge rectification energy storage circuit adopting the embodiment has smaller voltage drop and smaller electric energy loss in the charging process than the full-bridge rectification energy storage circuit in the prior art.
The third embodiment of the present invention is:
as shown in fig. 9, the energy density detection circuit is further defined on the basis of the first embodiment or the second embodiment:
the energy density detection circuit comprises a third diode D2, a second capacitor C2, a second resistor R1 and a third resistor R2;
the positive end of the third diode D2 is connected with the second output end of the generator;
the negative electrode end of the third diode D2 is connected with one end of the second capacitor C2;
the other end of the second capacitor C2 is grounded;
the output end of the generator charges the second capacitor C2 through the positive end of the third diode D2, the current directions of the first diode D1 and the third diode D2 are the same, and the current directions of the first capacitor C1 and the second capacitor C2 are also ensured to be the same, so that the full-charging voltages of the first capacitor C1 and the second capacitor C2 are the same, and the voltage value of the first capacitor C1 can be judged by detecting the voltage value of the second capacitor C2;
one end of the second resistor R1 is connected with the negative terminal of the third diode D2;
the other end of the second resistor R1 is respectively connected with one end of the third resistor R2 and a second input end of the power management chip U1;
the other end of the third resistor R2 is grounded;
the second resistor R1 and the third resistor R2 are connected in series to form a pull-up and pull-down resistor, and are connected in parallel with the second capacitor C2, so that the voltage value of the second capacitor C2 can be judged through the proportional relation between the second resistor R1 and the third resistor R2 only by identifying the ground resistance value of the third resistor R2, and the voltage value of the first capacitor C1 can be obtained according to the voltage value of the second capacitor C2;
specifically, in this embodiment, in order to meet the requirement of micro energy management, the power consumption of the resistors R1 and R2 needs to be small, and it is also ensured that the signal strength provided by the resistors R1 and R2 can meet the identification and use of the circuit, through experimental tests, it is obtained that the sum of the impedances of the resistors R1 and R2 is between 1000K ohms and 2000K ohms, and the power consumption can be controlled between 1.9 μ a and 3.8 μ a, and meanwhile, in order to match the technical requirement of the power management chip U1, the IVE energy acquisition determination point is set to 1/3, so that R1 selects 510K ohms, R2 selects 1000K ohms, and this is the minimum leakage (1.2 to 1.3 μ a) through actual measurement, and at the same time, the strength of signal detection can be ensured, and is the optimal selection value;
when the power management chip U2 detects that the voltage of the second capacitor C2 satisfies a preset value, and at this time, the first capacitor C1 is at the highest power density, that is, at the best discharge time, the power management chip U2 turns on the first capacitor C1 to discharge, the power stored in the first capacitor C1 is controlled by the power management chip U2 to be output to the VCC port, the VCC electrical network is connected to the power supply port of the digital radio frequency chip U2, at this time, the digital radio frequency chip U2 is powered on, waiting for triggering and starting, any key is closed, the digital radio frequency chip U2 triggers starting and waking up, and the preset encoded data is called to generate a high-frequency signal through the oscillation circuit and is transmitted through the antenna.
The embodiment of the utility model provides a fourth is:
as shown in fig. 10, on the basis of any of the above embodiments, the key portion is further defined:
also includes a first resistor R3;
the second ends of the plurality of keys are respectively connected with a plurality of signal input ends of the digital radio frequency chip U2 in a one-to-one correspondence manner;
second ends of the plurality of keys are respectively connected with one end of the first resistor R3;
the other end of the first resistor R3 is grounded;
as shown in fig. 11, in the prior art, a key of the self-generating switch has no series resistor and is directly connected to a ground line, but the key series resistor is adopted in the embodiment to reduce the release current of the IO port to the ground after the key is closed;
specifically, in this example, the voltage of the digital radio frequency chip U2 is controlled to be 1.9-2.0V, the value of the first resistor R3 is 10K Ω, which is 10000 Ω, the ground current at the IO end is clamped within 2.0V/10000 Ω, which is 200 μ a, the clamping means to limit the potential or current at a certain point to a specified value, because the IO end of the digital radio frequency chip U2 further has an internal resistance, the ground current at the IO end can be completely guaranteed to be less than 200 μ a, compared with the prior art in which the IO end has no external current limiting resistor, the current at the IO end cannot be accurately clamped, which is more favorable for micro energy management in the self-generating switch.
The embodiment of the utility model provides a five do:
on the basis of any of the above embodiments, the antenna part is further defined:
the antenna is an on-board antenna;
specifically, the antenna in this embodiment is an onboard antenna specifically designed for 433M frequency, and is different from the prior art in which a self-generating switch employs an external helical antenna or a ceramic antenna;
as shown in fig. 12, the on-board antenna is designed by combining a PCB copper sheet with a PCB via hole, wherein the width and thickness of the copper sheet, the diameter of the via hole, and the length, distance and arrangement of the copper sheet directly affect the strength of a transmission signal, and through experimental tests, the +13DB transmission power is loaded on the on-board antenna, the transmission distance of the antenna can reach 40 meters on the open ground, and although the wireless transmission distance of the antenna adopting other forms is possibly farther, 40 meters can sufficiently meet the performance requirements of a self-generating switch on the antenna, so that the on-board antenna is applicable to a self-generating switch system, and the cost of the on-board antenna is lower, and the power loss can be reduced compared with the prior art.
Through the actual test, from power consumption parameter of power generation switch control circuit as table 1:
TABLE 1 Power consumption parameter test analysis table
By table 1, from power generation switch control circuit only need 200 mu J's energy can drive, for prior art's power generation switch control circuit, the electric energy loss is very little, has realized the high-efficient storage and the conversion of electric energy.
In summary, the self-generating switch provided by the utility model, through connecting the ground resistor in series at the key, is different from the prior art in which the key is directly connected with the ground wire, can reduce the release current of the IO port to the ground after the key is closed, has smaller electric energy loss, and is beneficial to self-generating micro-energy management; in the rectifier circuit, only one diode is adopted to charge the capacitor, the positive end of the generator is connected with the positive end of the diode, and the negative end of the generator is grounded, so that a bridge rectifier circuit consisting of 4 diodes adopted in the prior art is replaced, the generation at each time can be ensured not to be influenced by human, the stability is higher, the voltage drop is lower, the electric energy loss is lower, and the self-generating circuit is more suitable for a press-type self-generating charging circuit; by adopting the onboard antenna to replace an external spiral antenna or ceramic antenna in the prior art, the electric energy loss can be reduced, and the performance requirement of the self-generating switch system can be met; in conclusion, the circuit arrangement of the self-generating switch can realize efficient storage and conversion of electric energy, the electric energy loss is extremely low, and energy is saved greatly.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. A self-generating switch is characterized by comprising a key, a driving structure, a generator, a first diode, a first capacitor, an energy density detection circuit, a power management chip, a digital radio frequency chip and an antenna;
the driving structure is respectively connected with the triggering end of the key and the generator;
the first output end of the generator is connected with the positive end of the first diode;
one end of the first capacitor is connected with the negative end of the first diode and the first input end of the power management chip respectively;
the other end of the first capacitor is grounded;
the second output end of the generator is connected with the input end of the energy density detection circuit;
the output end of the energy density detection circuit is connected with the second input end of the power management chip;
the output end of the power management chip is connected with the power supply end of the digital radio frequency chip;
the first end of the key is connected with the signal input end of the digital radio frequency chip;
and the output end of the digital radio frequency chip is connected with the antenna.
2. The self-generating switch according to claim 1, further comprising a first resistor;
the second end of the key is connected with one end of the first resistor;
the other end of the first resistor is grounded.
3. The self-generating switch according to claim 2, wherein first ends of the plurality of keys are respectively connected with the plurality of signal input ends of the digital radio frequency chip in a one-to-one correspondence manner;
the second ends of the plurality of keys are respectively connected with the one end of the first resistor.
4. The self-generating switch according to claim 1, wherein the first output terminal of the generator is a positive terminal;
and the negative end of the generator is grounded.
5. The self-generating switch according to claim 1, wherein the first capacitor is a tantalum capacitor.
6. The self-generating switch according to any one of claims 1 to 5, further comprising a second diode;
the second diode and the first capacitor are connected in parallel.
7. The self-generating switch according to claim 6, wherein the second diode is a zener diode.
8. The self-generating switch according to any one of claims 1 to 5, wherein the energy density detection circuit comprises a third diode, a second capacitor, a second resistor and a third resistor;
the positive end of the third diode is connected with the second output end of the generator;
the negative electrode end of the third diode is connected with one end of the second capacitor;
the other end of the second capacitor is grounded;
one end of the second resistor is connected with the negative electrode end of the third diode;
the other end of the second resistor is respectively connected with one end of the third resistor and the second input end of the power management chip;
the other end of the third resistor is grounded.
9. The self-generating switch according to claim 8, wherein the second resistor has a resistance of 510K ohms;
the resistance value of the third resistor is 1000K ohms.
10. The self-generating switch according to any one of claims 1 to 5, wherein the antenna is an on-board antenna.
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| CN202120123712.8U CN214626475U (en) | 2021-01-15 | 2021-01-15 | Self-generating switch |
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| CN202120123712.8U Active CN214626475U (en) | 2021-01-15 | 2021-01-15 | Self-generating switch |
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